Shock-absorber.



P. M; FREER. SHOCK ABSORBER. APPLICATION FILED 00'1'. 29,1908.

Patented Agg. 10, 1909.

ma nu a UNITED swims;

PATENT QEFICE;

PHELPS M. met, or BAIRBERTON, onmsssrenoiaor ONELFOURTH To WILLIAM w. POPE AND ONE-FOURTH TO CHARLES W. HAWKI-NS', BQLPHQEAKBQN, 01110.

- To all-whom it may concern:

Be it known thati; Pnnnrs Fawn, a

citizen of the United States, residing-at Bar instrumentality day a second instrumentality connected therewith by springs and the oba ject. thereof {is to provide a device of the class named nrinnarily designed for use in connection WIth self-propelled vehicles, to absorb or neutralize the sudden shockinci den-t to the use of vehicle springs on the reach way and to prevent transmission of a sudden vertical movement of the axle relative to the body thereof.

' A further object of this invention is to provide a device, which wilif hesimplc strong, durable in I use, easily manufactured,

one which is capable of em loyment in connection with any type of springs, either those in use on avehicle or where used in any other connection. A. still further object of this invention is so to so construct the device that it may be appliedito completed vehicles of substan-.

tially any variety with little or noalteration in the general make up thereof, thereby malt ing' it a substantially 'nniversally applicable device. v y 1 With the foregoing and other objectsin View, the invention consists-pin the novel construction, combination and arrangement of parts constituting the invention to he so hereinafiter specifically" described and illus-.

trated in the accompanying drawings which form apart hereof wherein is shown the re.-' 1

' ferredembodiment of the invention, i lustret tl by way of'exa'in' 1c in connection with i eiirssfllt r 4: 6,; i nv aitiationsan ms cations can i he resorted h rees 'p's'n ence numerals indicate like parts in the dif ferent figures: Figure l is a view in side elevetion of the rear iaoe of the device with a portion of the cover therefor broken away i to better illu'streto the. interior thereof. Fig.

T Speeifica'tionof Letters Patent, Applieationfiled Qetohe: 2e, sm; Sens]; no; seal-so.

.72 is a.

neutralizing a shock communicated to an possessed of a high degree of eficiency and ,body of the fie" I time that 'ht ges which flomgwilihlnth Scope 1f t g l m y,

- MQunted in n-Ywhich similar refer V 'snooxn nsonmi- Patented Aug. 10, .1909.

vertical central, sectional view of a device embed ing this invention on line X of Fig. 1. E1g. 3[is a view in end elevation of a camemployed; andfliig. 4 isa view in side elevat onoifthe'device shown in, Figs. so 1 "1 and 2 in operative relation, with respect to Y ,'-;-therear-portion, axle and springs of a vehi'cle. 'ehsorhers Referring to the drawings in detail,'the

1 reference numeral 1 denotes a casing preferv ably of the general shape shown 1n the drawin s, provided withlaterally-extending integra' lugs Qhitving openings 3 through" which may extendholdfastdevices for .securel'ypositioniiigthedevice. The casm is. further provided with a whll' 5- from which extends 'an end flange 6"and two laterally, preferably parallel flanges Zffrom which extend convergingflangesz s g ited by two flanges 9 pre-ferably rneeting at an apex 10 in the form of anvobtuse angle. Extending laterally-$120111 the'fianges 7 8\.and 9 is acontinuous integral-Hag e 11 through which extend threaded openings 1210' receive screws 13 for securingthereon a cover 14. The wall 5 and coverll iare provided with alined openin s to receivetwotransverselyextending bo ts -"1} ,[for ,a po -pose" to be stated. The wall 5 is also provided with ,an' approximately central opening provided with a hub 16 in which is mounted a rotary tion 18 terminating at its ends in shoul ers 19 from "which extend portions-2O arran ed to abut against the lateral flanges; 8. X-

tending approximately. fromtthe shoulder 19 of the membernlz'l toxeschi pi -the corners formed by the fiangesaonnd i giafthe device, are a air [of-s-ring --resilient;vmernbers 21, of a width suiiicient to -extend from the wall 5 to the cover. is, 'With'their medial portions thickened to decreaselhe flexibility thereof.v

the inne'r faces of each 'ofthe resilient. .nrembers 21 is preferably :placed a wearresisting member 22 mm osed. of some such gnaterial as vulcan'hed herror its equiva the opening Ill'IOHIIClQ-A by Y the .hub 16- is o fri'ction redncing bushin 23 f within which is 'al cein' comprising a c indrical portion 24, mounted in the bus ling 23 and' from which extends a preferably squared projecting shank 25.- The opposite endof the cylindrical portion24 is prefer- ,110

ably cup-shapedand' formed with a periphery 2G, apart ofwhich is eccentric to the axis of the cylindrical portion 24. The inner face of the peripheral cam-shaped por t-ion 26 is inclined inwardly at 27 forming an annular recess 28,,whereby when said cylindrical. portion is inserted in the bushing the cam-shaped peripheral portion 26 will telescope the hub 16, and the bushing 23 will. project inwardly into the recess 28, thereby constituting substantially telescoping members. The surface of .the periphery 26 is interrupted at the pointindicated by the reference numeral 29 by a'napproximately concave portion,- for a purpose to be described.

-' 5 In setting up a device embodying the structure just described, the cover 14 of the member 1 is removed and the shoe 17 placed in position. -()ne of the members 21 with its protective wear-resisting strip 22 is then. forced edgewise into position, with the lower ends thereof resting against the shoulder 19 of the member 17 and with their upper ends in the angle formed by the intersection of the flanges 6 and 7. The shank 25 and cylindrical portion of the cam are then inserted in the opening formed by the bushing 23with the concave portion of the periphery of the cam 29. turned toward the already positioned members 21 and 22, and as the radius of the concaved portion of the cam which' is 'toward the members 21 and 22 is less than the balance thereof, it may be properly seated without encountering the members 21 and 22. After the camhas been properly seated, a proper tool isfapplied to the squaredshank 25 and it is rotated in such a manner to bring the portion 29 opposite the position to be occupied by the ,otherpainof members '21 or'22 which may thenbe readily inserted edgewise into their 0; Y 'tion of the 'cam being brought .to

seats in a manner similar to theseating of the two members 21 'or 22. The cam is then rotated so as to bring it to a position substantially as shown in Fig. 1, withthe concave portion 29 at the top and with those portions of the cam having the larger radiiin frictionalengagement with the members 22, and in consequence of the enlarged porear 1 against the members 21 provided with their 'wear-resistmg protective 1nembers22 the members 21" will be under tension at all timeswhen the parts are'assembled,so that the cam 24 will have no tendency to move without the application of power to the shank 25; in other words, when the cam 24:

v f has been partiallyrotated it will not return 0 to its. former'position without the application oi. extraneous force. From the fact that the members 21 are undertension at all times when 'the evice is set up and engage the cam-shaped portion 26 on opposite sides thereof, the thrust on the bearing is to a large extent equalized thereby reducing the wear incident to the use of the device.

In view of this fact, free rotation of the cam is effectually retarded by this frictional cnalso serve as means for aiding in securing the entire device to a supporting mediunn The operation of the device 15 shown diarammatically in Fig. i in which the device is secured to the/frame 30 of a vehicle by .holdfast devices 31, with the lower end A lever 32 is then atthereof depending. ta'chedl to the squared shank 25 and its outer end is pivotally-connected to a link 33 pivotally-attached to a member 3 fixedly-secured to the axle 35 of the vehicle, which is also provided with the customary elliptical springs 36. It will be obvious of course that I the device may be attached to the axle of r the vehicle and the link 33 be pivotally attached to the body 30, thereby reversing the position of the members,but the device performs the same function in either position. The Vertical. movement of the axle 35 of the vehicle during its progress over the roadway will cause the link 33 to oscillate the lever 32 causing thereby a rotary movement of the cam in its bearing. This rotary movement. of the cam is resisted by the frictional contact of the peripheral portion thereof with the wear-resisting members 22 held thereagainst by' the resilient action of the spring members 21, which maintain cdnstant pressure against the periphery of the cam.

From the foregoing it will be seen that this device affords an unusually simple and-- eiiective device to neutralize'or absorb the sudden relative movement of one instrumentality suchas the axle of the vehicle with respect to the position of another instrunientality, and while this device has been described with reference to and in connection with vehicles, its usefulness in other places will be apparent.

What I claimand desire to secure by Letters Patent, is

1. A device for neutralizing or absorbing the shock incident to the movement of two instrumentalities adapted to be connected by a spring, comprising a. rotatable element suitably supported by one of said instrumentalities providedflwith a cumshaped portion, an arm having one end thereof connected with said element for roa I teens 'tating; thetsame, the opposite end f arm being pivotally-connected to a complev mentaryv instrumentality and .av yieldable braking member embodying a bar with its .m'edial portion disposedin-j frictional engagement with the periphery of said cani-- -shaped portion and tangential .thereto 'for causing resistanceto the movement of one instrumentality with respectto the other. 2. A dGVlCB'fOI' neutralizing or absorbing the shock incident to the movement of 'two instrumentalitiesadapted to be connected by a spring, comprising a rotatable element suitably supported by one of said instrumens talities provided with a cam-shaped portion,

anarm having one end thereof connected with said element for rotating the same, the

opposite end offsa-id arm being-pivotally-' connected to a complementary instrumentality and ayieldable braking member em-I bodying a-bar having a thickened medial portion adapted to be disposed tangentially .with respect to. the. cam shaped portion :oi'

said element to engage the periphery thereof for causing. resistance. to the movement of a one ofgsaid instrumentalitieswith' respect to the other.

3.. A device for neutralizing orabsorbing the shock incident to themovement of two instrumenta-lities adapted to beconnected by] a spring, comprising; a rotatable element suitably su porte'dbyTone-of said instrusame, the opposite ehidof said arm mentalitie's provided iwith'a cam-shaped por-- tion, an arm having onefiend thereof conec'ted with said element, for "rotatingethe pivotally'connected-toa complementary instrumentality and ayieldable braking member embodying a bar witha thickened "me dial portion disposed with the thickened .portion thereof 1Il engaging relation with i the periphery of said element and tangentially thereto for causing resistance to the movement of one instrumentality with l-respect to the other.

4. A device forneutralizingor absorbing the shock incident to themovement of-two i v instrumentalities adaptedto benonnected by a spring, comprisinga rotatable element suitably supported by one of said instrw;

mentalities' providedwith a 'cam-shapedflpon' tion, an arm havingone'end thereof: con-f nected with said element 'for rotatlngfthe' same, the: opposite end bf said arm.- g

' embodying ing- pivotally-connected to a complementary instrumentality, a yieldable braking member '1 bar with a thickened medial portiqn'dlsposed withthe thickened portion in frictional engagement with the periphery of said cam-shaped ortion and means for su portingi said 'bra "ng member tangentia y tosald cam-shaped portion for causing resistance'to the movement of one instru- 'mentalit with respect tothe other.

5. A evice for neutralizing tor absorbing the shock incident ,to the-movement of two instrumentalities adapted'to be connected by a s ring, comprising a rotatable element esuitab y supported s b'y one of said instru- 1..n 1entalities'provided'with a cam-shaped por- .;t1 on, anarm having one end thereof connected. with said element forrotating the same,-;- the;; opposite; end of said arm being pivotally connectedto a complementary instrumentality, a yieldable braking member, havinga thickened medial portion provided with-a liner of wear-resisting material dis- I posed tangentially to said cam-shaped I por- 6. A device for neutralizingor. absorbing v the shock incident to the movement of two instrumentalities adapted to' be connected by {a spring, i-eompr1sing arotatable element suitably'.;supported by one of said instruimentalities"provided with a cam shaped 'nl'a mghaving one end thereof contli aid element for rotating the ppositej; end of said arm being .pivotbllybonnected to a complementary instrumentality; ands; resilient, braking member suitably supported with its medial portion infrictiona qengagement with the peripheryfof said cam-shaped portion and tangential thereto,

- In' testimony whereof. I have hereunto set my hand in presence of two subscribing witnesses.

n wPI-IELPS M. FREER. v Witnesses: v

C. E, HUMPHREY,

Fox. 

